Open terminal and edit sources.list:
Code:
sudo nano /etc/apt/sources.list
Uncomment these hashes (#)
Code:
deb http://archive.canonical.com/ubuntu quantal partner deb-src http://archive.canonical.com/ubuntu quantal partner
after this step execute the update command:
Code:
sudo apt-get update && sudo apt-get install skype
et voilá skype will be installed in your lubuntu distro.